Database "Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production" was installed as a part of Oracle Database Appliance, there was no migration. Do you have any idea how to solve this problem?
Thank you.

also just a generic error message w/o a root cause.
Is there a chance to get a testcase? Best would be if you create a test table in your env and fill it with data, as soon as you can reproduce the issue post the create table statement as well as your insert commands to fill the table with content and I'll check. Alternatively feel free to log a service request.

Please make sure to close the database link (or just exit from SQL*Plus) every time before you change a gateway parameter in the init file as only when a new gateway session is started the init file is read.